Jack



Jan, 1, 1924 A. J. SLONECKER JACK Filed Dec. 20, 1922 3 Sheets-Sheet 324:1*

Patented Idan., l, 1924.

narran stares lld@ PATENT FFFQ.

.AIBIBAIM SLONECKER, OF TEENTON, MISSOURI, ASSIG-NOR TO SLONECKERPRODUCTS COMPANY, OF TRENTON, MISSOURI. I

JACK.

Application filed December 20, 1922.

To all whom t may concern:

Be it known that I, ABmAM J. SLoNnoKnn, a citizen of the United States,residing at Trenton, in the county of Grundy and Sta-'te e of Missouri,have invented a new and useful Jack, of which the following is aspecification.

This invention relates to lifting jacks and aims to provide a. novelform of jack which lo may. be conveniently operated in the lifting andsupporting of a building or the like, thereby eliminating the necessityof removing the ack and blocking under the building when the jack hasbeen moved to the 1&3 limit of its upward movement.

Another object of the invention is to provide a jack having a swiveledbase, the base being reversible to increase or shorten the length of thelifting screw forming a part so of the jack, thereby adapting the jackfor various usages.

A still further object of the invention is to provide a quiclnactingjack wherein the weight of the work being lifted may be at transferredfrom one base to the other base and the base readily rotated and movedto a position adjacent to the upper end of the lifting screw.

With the foregoing and other objects in view which will appear as thedescription proceeds, the invention resides in the combination andarrangement of parts and in the details of construction hereinafterdescribed and claimed, it being understood- 1re 5 is a vertlcalsectional view through the jack.

Figure 6 is a vertical sectional view through a jack of the hydraulictype.

Referring to the drawings `bychanacters of reference, the deviceembodies a lifting screw 5 which is formed with threads 6 dis- SerialNo. 608,034.

posed throughout substantially the entire length of the screw, therebeing provided a reduced portion 7, however, at the lower end of thescrew.

The inner base which is indicated at 8 is yformed withacentral opening 9of a diameter greater than the diameter of the screw 5 to 'permit thelower end of the screw to be positioned therein, the upper end of theinner base being designed to contact with that portion of the innersurface of the outer base 10 directly above the inner base to re strictupward movement of the inner base.

A wall 11 forms a part of the base 8 and Formed in the side wall of thebase 8 is' an opening 13 through which opening the key 12 may be passed,when the base S is reversed to add length to the lifting screw 5, itbeing obvious that by removing the cotter key 12 from its position asshown by Figure 1 of the drawings, and reversing the base 8 end `forend, the shoulder indicated at 14 and formed at the base of the threadedportion of the screw 5 will Contact with the opposite side of the wall11, the Cotter key 12 being positioned in its opening in a manner asdescribed. It will be further seen that by removing the inner base fromthe Vscrew 5, the screw 5 may be further rotated to lengthen its stroke.

The outer base is preferably hollow and formed with an enlarged lowerextremity 15 designed to engage the supporting blocks 16 usuallyemployed in connection with lifting jacks, for lifting and supportingbuildings. Formed in the upper end of the outer base 10 is a threadedopening to accommodate the lifting screw 5 so that when the weight ofthe work under operation has been transferredV from the base 10 to theinner base 8, the outer base 1G may be readily and easily rotated in ananti-clochwiee direction to cause the same to travel to the limit of itsupward movement and rest at the upper end of the screw 5.. f

Secured to the screw 5 at the upper end thereof is a head 1-7, which isformed with a transverse opening to accommodate the operating rod 18,the upper end of the screw 5 being reduced as at 19 to accommodate thework engaging head 20 in a manner t0 permit rot-ation of the screw 5within the head 20, the upper surface of the head being howeverroughened to cause the same to be held stationary with respect tov lbase10 may be readily rotated to cause the same t0' move over the screw 5.vThese handles also provide convenient means for handling the'jack tofacilitate the transporting of the same.

In the use of the jaclr, it is obvious that with the jack in apositionas shown by Figure Vl of the drawings, and the blocks le and 1-6as shown in this figure have been positioned under the bases 8 and l0,the base may be rotated until the same moves to 4the upper end of thescrew 5, whereupon blocks may be positioned under the base l0 anddispOSejd in parallel relation with the blocks 22. llllith the base l()in this position, it is obvious that as the screw 5 is rotated to lift,the base 8 will be elevated to a posi-tion wherein the lower edgethereof lies in a plane with the lower edge of the base l0.

A block may now be positionedL under the base 8 to transfer the weightfrom the base l() to the base 8 whereupon the operation as beforedescribed may be repeated indefinitely until thc building has beenraised to the desired height.

As shown by Figures 3, land 5 of the drawings the principle of the jackis applied to a house movers jack, the screw being indicated at 23 andformed with a tapered upper extremity 24 as well as a tapered lowerextremity 25, which tapered extremities are designed to enter thedepressions formed in the plates 26 and 27 respectively, the latterplate being' relatively long, may be employed to span the space betweenadjacent supporting blocks shown more particuhirly by figure -l of thedrawings. ln this form of the inventioir the screw acts in the capacityof a combined lifting screw and base, thebell shaped base 28 cooperatingtherewith being formed with a threaded opening to accommodate the screw.

As shown-the base 28 is formed with oppositely disposed cut out portions29 through which the plate 27 to be engaged by the lower end of thescrew 23, may be passed to properly posi-tien the same, for supportingthe workivh-ile the base 28is raisedfor blocking as shown by Figure 5.Openings 30 are formed in the upper end of the screw 23 and are designedto receive the operating bar 3l which may be rotated to rotate the Yscrew 23 in manipulatiiig the jack.

Flanges 32 are formed on' the base 28 and provide meansv whereby thebase 28 may be `rotated'to accomplish the moving of the base 28 to thelimit of its upward movement, whereupon the blocks may be positionedthereunder to support thejack and the work` being lifted.

Each 0f the flanges is formed with an opening 33 for the reception of abar topermit the base 28'to be rotated under pressure.'

cured to the lifting rodv 38 that extends' through the base 35, theupper end of the lifting rod being supplied with a head 39.

This rod 38 extends below the wall 40 of the base 35 and is formed withafoot 4l at the lower end thereof which foot is formedV with a roughenedsurface designed to contact with the supporting blocks employed inconnection with devices of this'character, to prevent slipping of thejack while the same is in operation.

At the lower end of the base 35 is an enlargement 42 which rests on theblocks usually positioned under the jack for supporting the jack in apredetermined position after the same has been raised. Ports 42 areprovided in the cylinder 36 in which ports pipes 43 arepositioned, thepipesl 43 providing communication betweenv the cylinder 36 and asuitable source of fluid supply not shown, means being provided forcontrolling the passage of fluid to and from the cylinder to cause theoperation of the rod 38.

In the operation of the jack as shown by Figure 6 of the drawings, fluidis admitted to the lower portion of the cylinder 36 through the lowerpipe 43 with the result that the rod 38 is raised. When the rod 38 hasbeen moved to the limit of its upward movement, a block is positionedunder the foot ll whereupon fluid is admitted to the cylinder 36 throughthe upper pipe 34, raising the base 35 to a position to permit blocks tobe laid thereunder.

This operation is repeated until the work being lifted has reached thedesired height.

l. A lifting jack comprising a screw, a.

` reversible base swiveled on the lower end of the screw, a hollowmovable base adapted to move over the screw, means for rotating thescrew, and handles on the hollow movable base for rotating the hollowmovable base.

2. A lift-ing jack comprising a screw having a continuous thread.:termed then-2on-1 and having a reduced lower extremity, a hase same tomove over the screw, and means for 10 having an opening extendingtherethrough rotating the screw.

and having a wall formed adjacent to one In testimony that I claim theforegoing end of the base, said wall having an opening as my own, I havehereto aliixed my signato accommodate the reduced end, means for ture inthe presence of two witnesses.

securing the base to the screw, a hollow mov- ABIRAM J. SLONECKER. ablebase adapted to normally house the lirst Witnesses: mentioned base, saidhollow movable base I. E. SIMPSON,

having a threaded opening to permit the AGNES RocKnLLr.

